package com.liuyz;

import java.util.Hashtable;

@SuppressWarnings({"all"})
public class Hashtable_ {

    public static void main(String[] args) {
        Hashtable table = new Hashtable();
        table.put(null, "测试");
        table.put("测试", null);
        table.put("001", "张三");
        table.put("002", "李四");
        table.put("003", "王五");
        table.put("002", "赵六");
        System.out.println(table);
    }
}
